[INFO] fetching crate stdout-channel 0.6.0...
[INFO] checking stdout-channel-0.6.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate stdout-channel 0.6.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate stdout-channel 0.6.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stdout-channel 0.6.0
[INFO] finished tweaking crates.io crate stdout-channel 0.6.0
[INFO] tweaked toml for crates.io crate stdout-channel 0.6.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 94 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding convert_case v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding env_logger v0.10.2 (latest: v0.11.3)
[INFO] [stderr]       Adding fallible-iterator v0.2.0 (latest: v0.3.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stack-string v0.8.0
[INFO] [stderr]   Downloaded deadqueue v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b5b16dc5dd9cf6610063597cb211237eabb6cdfc478dc6c0f4c059b9f805184
[INFO] running `Command { std: "docker" "start" "-a" "4b5b16dc5dd9cf6610063597cb211237eabb6cdfc478dc6c0f4c059b9f805184", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b5b16dc5dd9cf6610063597cb211237eabb6cdfc478dc6c0f4c059b9f805184", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b5b16dc5dd9cf6610063597cb211237eabb6cdfc478dc6c0f4c059b9f805184", kill_on_drop: false }`
[INFO] [stdout] 4b5b16dc5dd9cf6610063597cb211237eabb6cdfc478dc6c0f4c059b9f805184
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebcf5061246c5a25f1ff316ec4aa89bb78ab615029bdcfd0497ef864e49a48c5
[INFO] running `Command { std: "docker" "start" "-a" "ebcf5061246c5a25f1ff316ec4aa89bb78ab615029bdcfd0497ef864e49a48c5", kill_on_drop: false }`
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking finl_unicode v1.2.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking stringprep v0.1.4
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking is-terminal v0.4.12
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking md-5 v0.10.6
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking postgres-protocol v0.6.6
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking postgres-types v0.2.6
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking deadqueue v0.2.4
[INFO] [stderr]     Checking stdout-channel v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking stack-string v0.8.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.10s
[INFO] running `Command { std: "docker" "inspect" "ebcf5061246c5a25f1ff316ec4aa89bb78ab615029bdcfd0497ef864e49a48c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebcf5061246c5a25f1ff316ec4aa89bb78ab615029bdcfd0497ef864e49a48c5", kill_on_drop: false }`
[INFO] [stdout] ebcf5061246c5a25f1ff316ec4aa89bb78ab615029bdcfd0497ef864e49a48c5
[INFO] checking stdout-channel-0.6.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate stdout-channel 0.6.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate stdout-channel 0.6.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stdout-channel 0.6.0
[INFO] finished tweaking crates.io crate stdout-channel 0.6.0
[INFO] tweaked toml for crates.io crate stdout-channel 0.6.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 94 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding convert_case v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding env_logger v0.10.2 (latest: v0.11.3)
[INFO] [stderr]       Adding fallible-iterator v0.2.0 (latest: v0.3.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f747acd90ed440051f4a67d15fa0b43b97348c03475e50ccb2e6a1293501d3b6
[INFO] running `Command { std: "docker" "start" "-a" "f747acd90ed440051f4a67d15fa0b43b97348c03475e50ccb2e6a1293501d3b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f747acd90ed440051f4a67d15fa0b43b97348c03475e50ccb2e6a1293501d3b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f747acd90ed440051f4a67d15fa0b43b97348c03475e50ccb2e6a1293501d3b6", kill_on_drop: false }`
[INFO] [stdout] f747acd90ed440051f4a67d15fa0b43b97348c03475e50ccb2e6a1293501d3b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac65fcd4e17047469dc70b524257555d60e2a90d414d78d6527f674caca58a69
[INFO] running `Command { std: "docker" "start" "-a" "ac65fcd4e17047469dc70b524257555d60e2a90d414d78d6527f674caca58a69", kill_on_drop: false }`
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking finl_unicode v1.2.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking stringprep v0.1.4
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking is-terminal v0.4.12
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking md-5 v0.10.6
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking postgres-protocol v0.6.6
[INFO] [stderr]     Checking postgres-types v0.2.6
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking deadqueue v0.2.4
[INFO] [stderr]     Checking stdout-channel v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking stack-string v0.8.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 33.07s
[INFO] running `Command { std: "docker" "inspect" "ac65fcd4e17047469dc70b524257555d60e2a90d414d78d6527f674caca58a69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac65fcd4e17047469dc70b524257555d60e2a90d414d78d6527f674caca58a69", kill_on_drop: false }`
[INFO] [stdout] ac65fcd4e17047469dc70b524257555d60e2a90d414d78d6527f674caca58a69